Btrfs: correctly flush data on defrag when compression is enabled

PATCH New Filipe David Borba Manana 1 participant 1 message Mar 1, 2014 Btrfs file system

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Filipe David Borba Manana

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2014-03-01 10:56 UTC #0 lore raw

PATCH 1/1 Btrfs: correctly flush data on defrag when compression is enabled

When the defrag flag BTRFS_DEFRAG_RANGE_START_IO is set and compression enabled, we weren't flushing completely, as writing compressed extents is a 2 steps process, one to compress the data and another one to write the compressed data to disk.

Signed-off-by Filipe David Borba Manana <[email protected]>

---
 fs/btrfs/ioctl.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

fs/btrfs/ioctl.c +5 -1

index d4c1795..f914b5d 100644
@@ -1382,8 +1382,12 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
 		}
 	}
 
-	if ((range->flags & BTRFS_DEFRAG_RANGE_START_IO))
+	if ((range->flags & BTRFS_DEFRAG_RANGE_START_IO)) {
 		filemap_flush(inode->i_mapping);
+		if (test_bit(BTRFS_INODE_HAS_ASYNC_EXTENT,
+			     &BTRFS_I(inode)->runtime_flags))
+			filemap_flush(inode->i_mapping);
+	}
 
 	if ((range->flags & BTRFS_DEFRAG_RANGE_COMPRESS)) {
 		/* the filemap_flush will queue IO into the worker threads, but

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